A kind of catalytic cloth with the function of catalytic degradation of ethylene and its preparation and application

Abstract

The invention belongs to the technical field of catalytic materials and fresh-keeping of fruits and vegetables, and discloses a catalytic cloth with the function of catalytically degrading ethylene, as well as its preparation and application. Add permanganate, iron salt, cobalt salt and oxalate into water for hydrothermal reaction at a temperature of 70-120°C, and the solid product is washed and dried to obtain a powder catalyst; add the obtained catalyst to water, and disperse evenly by ultrasonic treatment , and then add silica sol to stir and disperse evenly to obtain a glue solution; spray the glue solution on the cloth base material, and obtain a catalytic cloth with the function of catalytically degrading ethylene after drying. The degradable ethylene catalytic cloth prepared by the present invention utilizes oxygen to finally degrade ethylene into carbon dioxide, and while removing ethylene, reduces the oxygen concentration to form an environment with low oxygen and high carbon dioxide; the water and water generated in the process of catalytic degradation of ethylene are adsorbed and catalyzed by silica gel particles. The water produced by the respiration of fruits and vegetables can effectively inhibit the growth and reproduction of microorganisms, and significantly prolong the freshness period of fruits and vegetables such as mango.

Description

technical field [0001] The invention belongs to the technical field of catalytic materials and fresh-keeping of fruits and vegetables, and in particular relates to a catalytic cloth with the function of catalytically degrading ethylene, as well as its preparation and application. Background technique [0002] Mango is a typical tropical fruit, known as the "King of Tropical Fruits". my country's mango planting areas are limited to parts of Hainan, Guangdong, Guangxi, Fujian, Yunnan, Taiwan and other provinces. Mango is rich in nutrients, rich in sugar, protein, fat, crude fiber, vitamin A, vitamin B, vitamin C, and a small amount of calcium, phosphorus, iron and other minerals. Mangoes are peak-respiratory and ethylene-sensitive fruits. They age and deteriorate quickly after harvest, and are extremely perishable. They mature after 6-8 days. At the same time, mangoes grow in high-temperature and rainy tropics-subtropics, and are susceptible to microbial infection during the...

AI Technical Summary

Problems solved by technology

[0004] At present, the methods for removing ethylene used in the storage of fruits and vegetables in my country include physical adsorption method, and activated carbon, zeolite, diatomite, etc. are commonly used as adsorbents, but there are problems such as easy saturation and desorption; oxidant oxidation method uses potassium permanganate And ozone, cheap, easy to obtain, has been widely used, but the fresh-keeping effect of potassium permanganate is not long, need to often replace the small package, easy to cause secondary pollution; ozone treatment will have poor air permeability, moisture permeability, and poor sterilization Ideal and other problems; Potassium permanganate and ozone treatment both have the problem of chemical substance residues, and the use effect is not good; the decompression removal method is easy to cause water loss and wilting of fruits and vegetables with large specific surface area, reducing their commercial value, and the cost is high; Therefore, it is of great economic value to develop an efficient and safe way to degrade ethylene and remove oxygen to preserve the tropical fruit mango.

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